Lexus ES: Hydraulic Control System Malfunction (C1214)
DESCRIPTION
The skid control ECU (brake booster with master cylinder assembly) controls braking force according to the hybrid control system regenerative braking force and provides the hydraulic pressure necessary for operating the master cylinder and each wheel cylinder according to the servo pressure sensor.
DTCs may be stored if one of the following occurs:
- Brake fluid leaks.
- Wheel cylinder vibrates due to uneven wear of a brake disc.
- Foreign matter enters a solenoid valve.
- Line pressure drops during air bleeding.
- Brake pads are replaced.
-
Rotors are replaced.
HINT:
When replacing the brake pads, retracting the brake caliper pistons and installing new brake pads will greatly increase the clearance between the brake pads and brake discs. This will result in a significant possibility of this DTC being stored the next time the brake pedal is depressed. As this is not a malfunction, clear the DTC if it is stored for this reason.
| DTC No. | Detection Item | INF Code | DTC Detection Condition | Trouble Area | MIL | Note |
|---|---|---|---|---|---|---|
| C1214 | Hydraulic Control System Malfunction | 431 432 436 438 440 441 442 |
|
| Comes on |
|
MONITOR DESCRIPTION
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After the power switch is turned off, the skid control ECU (brake booster with master cylinder assembly) automatically performs a pressure increase check to detect malfunctions that would be difficult to detect during normal braking.
During the current trip when the vehicle is being driven at a certain speed or more and the following sequence is met, if the skid control ECU (brake booster with master cylinder assembly) judges that there is a malfunction in a brake line in either of 2 systems, the MIL is illuminated and this DTC is stored.
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When the switching solenoid (SSA) and switching solenoid (SGH) are closed and the linear solenoid (SLA) is operating to increase servo pressure, the reaction force pressure rises simultaneously. When there is a malfunction in 1 system, the stroke amount increases because the amount of increase in reaction force pressure is proportional to the output piston stroke amount; therefore, when the reaction force pressure is a specific value or more for a certain amount of time, the system judges that there is a malfunction.
-
When the switching solenoid (SSA) and switching solenoid (SGH) are closed and the linear solenoid (SLA) is operating to increase servo pressure, the reaction force pressure rises simultaneously. When there is a malfunction in 1 system, the stroke amount increases because the amount of increase in reaction force pressure is proportional to the output piston stroke amount; therefore, when the reaction force pressure is a specific value or more for a certain amount of time, the system judges that there is a malfunction.
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When the brake pedal is depressed, the skid control ECU (brake booster with master cylinder assembly) monitors the servo pressure and increases the servo pressure by driving the linear solenoid (SLA).
When the brake pedal is depressed, if the actual servo pressure does not change even when the target servo pressure increases for a certain amount of time, the skid control ECU (brake booster with master cylinder assembly) judges that the linear solenoid (SLA) is stuck closed (the pressure increase during initial braking is abnormal) and illuminates the MIL and stores this DTC.
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The skid control ECU (brake booster with master cylinder assembly) monitors the relationship between the specified increase or decrease in servo pressure and the target brake fluid pressure.
When the brake pedal is depressed and the relationship between the servo pressure and the target brake fluid pressure is outside of the normal range, the skid control ECU (brake booster with master cylinder assembly) judges that the increasing pressure is abnormal and illuminates the MIL and stores a DTC.
Furthermore, when the brake pedal is released or while braking is being performed and the relationship between the servo pressure and the target brake fluid pressure is outside of the normal range, the skid control ECU (brake booster with master cylinder assembly) judges that the decreasing pressure is abnormal and illuminates the MIL and stores a DTC.
-
After the power switch is turned off, the skid control ECU (brake booster with master cylinder assembly) automatically performs a pressure increase check to detect malfunctions that would be difficult to detect during normal braking.
During the current trip when the vehicle is being driven at a certain speed or more and the following sequence is met, the skid control ECU (brake booster with master cylinder assembly) judges that the ABS reduction solenoid valve is leaking and illuminates the MIL and stores this DTC.
HINT:
Although the following sequence is related to the front left and front right, an identical sequence is performed to check for leaks in the rear left and rear right.
- The brake fluid pressure at the front left and front right wheel cylinders is equal to that of the brake booster with master cylinder assembly. No brake fluid pressure is applied to the rear wheel cylinders.
- The ABS holding solenoid valves of the 4 wheels are closed to isolate the brake booster with master cylinder assembly and each wheel cylinder, and the rear left and rear right ABS reduction solenoids are opened. At this time, the pressure does not change if there is no leak; however, if a front left or front right ABS reduction solenoid valve is leaking, because both wheel cylinders of the system that is leaking (front right and rear left, or front left and rear right) are connected, the pressure of the front wheel cylinder of the leaking system falls lower than that of the brake booster with master cylinder assembly.
- When the front right and front left ABS holding solenoid valves are opened, because brake fluid flows from the brake booster with master cylinder assembly to the leaking system, the servo pressure temporarily drops. At this time, if the drop in servo pressure is at a specific value or more and the servo pressure decreases at a specific value or less, it is temporarily judged that there is a leak malfunction.
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In the case of (c), if the pressure temporarily drops (temporarily judged as a leak malfunction), the ABS reduction solenoid valves are opened and closed repeatedly to eliminate the leak.
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Because the ABS reduction solenoid valve is leaking, brake fluid leaks to the reservoir inside the brake actuator assembly, such as in the case of (a). When the ABS pump motor is operated in this situation, brake fluid in the reservoir is pumped to the brake booster with master cylinder assembly and the servo pressure increases. As the increase in servo pressure loads the ABS pump motor, a rapid voltage drop is produced when the pump motor is stopped. Because of that, if the increase in servo pressure when the ABS pump motor is operating is above a specific value, and the time taken for the ABS pump motor voltage to drop when the ABS pump motor stops operating is shorter than normal, it is judged that there is a malfunction.
-
After the power switch is turned off, the skid control ECU (brake booster with master cylinder assembly) automatically performs a pressure increase check to detect malfunctions that would be difficult to detect during normal braking.
During the current trip when the vehicle is being driven at a certain speed or more and the following sequence is met, the skid control ECU (brake booster with master cylinder assembly) judges that the switching solenoid (SSA) or switching solenoid (SGH) is stuck closed and illuminates the MIL and stores a DTC.
- When the linear solenoid (SLR) is being operated to reduce servo pressure and the switching solenoid (SSA) and switching solenoid (SGH) are both closed, when the output piston is released, the volume of the reaction chamber expands, and because brake fluid is not introduced, a negative pressure is created.
- In the case of (a), if the negative pressure does not change for a certain amount of time, the skid control ECU (brake booster with master cylinder assembly) repeatedly opens and closes the switching solenoid (SSA) and switching solenoid (SGH).
-
After (b) is performed, the linear solenoid (SLA) is operated to increase servo pressure and the reaction force pressure rises. When the switching solenoid (SSA) is instructed to be off (open) or the switching solenoid (SGH) is instructed to be on (open) and there is a stuck closed malfunction, because the reaction force pressure does not reduce, when the reaction pressure exceeds a specific value for a certain amount of time, the skid control ECU (brake booster with master cylinder assembly) judges that there is a malfunction.
MONITOR STRATEGY
| Related DTCs | C139A: One hydraulic path fail C139D: Linear solenoid (SLA) stuck on C13CD: Brake pressure too low C13CE: Brake pressure too high C1400: ABS reduction solenoid leakage C14EE: Switching solenoid (SSA) stuck on C14F7: Switching solenoid (SGH) stuck on |
| Required Sensors/Components(Main) | Skid control ECU (brake booster with master cylinder assembly) Brake actuator (brake booster with master cylinder assembly) Brake actuator assembly |
| Required Sensors/Components(Related) | Speed sensor Stop light switch assembly Skid control ECU (brake booster with master cylinder assembly) Brake actuator (brake booster with master cylinder assembly) Brake pedal stroke sensor assembly |
| Frequency of Operation | Continuous: C139D, C13CD, C13CE After power switch off: C139A, C1400, C14EE, C14F7 |
| Duration | Within 1 second: C139A (Case 1), C139A (Case 2), C139D (Case 1), C139D (Case 2), C139D (Case 3), C13CD (Case 1), C13CD (Case 2), C13CE (Case 1), C13CE (Case 2), C13CE (Case 3) and C1400 1.5 seconds: (b) or (d) in the table of C14EE and C14F7 in Typical Malfunction Thresholds 6 seconds: (a) or (c) in the table of C14EE and C14F7 in Typical Malfunction Thresholds |
| MIL Operation | Immediately |
| Sequence of Operation | C1400:
|
TYPICAL ENABLING CONDITIONS
C139A| *: Electric Parking Brake System | |
| Monitor runs whenever the following DTCs are not stored | C0501, C0507, C050D, C0513 (Speed sensor range/performance) C0502, C0508, C050E, C0514 (Speed sensor circuit low) C0503, C0509, C050F, C0515 (Speed sensor circuit high) C0504, C050A, C0510, C0516 (Speed sensor intermittent/erratic) C051C (Case 1) (Acceleration sensor range/performance) C051C (Case 2) (Acceleration sensor range/performance) C051C (Case 3) (Acceleration sensor range/performance) C051C (Case 4) (Acceleration sensor range/performance) C051E (Acceleration sensor intermittent/erratic) C0520 (Case 1) (Acceleration sensor 2 out of range) C0520 (Case 2) (Acceleration sensor 1 and acceleration sensor 2 out of range) C0520 (Case 3) (Acceleration sensor internal malfunction) C052B (ABS pump motor range/performance) C052D (ABS pump motor circuit high) C052E (ABS pump motor open circuit) C0562 (Brake pedal stroke sensor assembly voltage circuit/open) C0594 (Pump motor performance) C0597 (Case 1) (EEPROM malfunction) C0597 (Case 2) (Lost communication) C0597 (Case 3) (CPU malfunction) C0597 (Case 4) (IC malfunction) C1202 (Brake master cylinder reservoir assembly level too low) C120F (Brake fluid level warning switch open circuit) C121D (Pump motor open circuit) C121E (Pump motor circuit high) C123B (IG1 circuit low) C123E (IG2 circuit low) C1240 (Yaw rate and acceleration sensor incorrect) C1241 (Case 1 to 11) (Brake system voltage circuit low) C124A (CAN communication identification signal) C124B (Brake pedal stroke sensor assembly invalid data) C1256 (Accumulator pressure too low) C12A6, C12BC, C12D2, C12E8 (ABS holding solenoid range/performance) C12A7, C12BD, C12D3, C12E9 (ABS holding solenoid circuit low) C12A8, C12BE, C12D4, C12EA (ABS holding solenoid circuit high) C12B2, C12C8, C12DE, C12F4 (ABS reduction solenoid circuit low) C12B3, C12C9, C12DF, C12F5 (ABS reduction solenoid circuit high) C12FA (Main relay circuit low) C12FB (Main relay circuit high) C1336 (Acceleration sensor exceeded learning limit) C1345 (Linear solenoid open current learning not complete) C1349 (ABS holding solenoid open current learning not complete) C1392 (Brake pedal stroke sensor learning not complete) C139D (Linear solenoid (SLA) stuck on) C13C1, C13CA, C14F2, C14FB (Linear solenoid range/performance) C13C2, C13CB, C14F3, C14FC (Linear solenoid circuit low) C13C3, C13CC, C14F4, C14FD (Linear solenoid circuit high) C13CD (Brake pressure too low) C13CE (Brake pressure too high) C1400 (ABS reduction solenoid leakage) C140B, C140C, C140D, C140E (2 wheel speed sensors malfunction) C1417 (Brake system voltage circuit high) C1427 (ABS pump motor stuck) C1451 (High pressure hydraulic tube air bleeding not complete) C146E (ABS solenoid power supply relay circuit low) C146F (ABS solenoid power supply relay circuit high) C14B0 (Reaction force pressure sensor voltage circuit check) C14B1 (Reaction force pressure sensor lost communication) C14B2 (Reaction force pressure sensor internal malfunction) C14B3 (Reaction force pressure sensor exceeded learning limit) C14B4 (Reaction force pressure sensor intermittent/erratic) C14B5 (Reaction force pressure sensor invalid data) C14B6 (Brake stroke/reaction force pressure correlation) C14C0 (Servo pressure sensor voltage circuit check) C14C1 (Servo pressure sensor lost communication) C14C2 (Servo pressure sensor internal malfunction) C14C3 (Servo pressure sensor exceeded learning limit) C14C4 (Servo pressure sensor intermittent/erratic) C14C5 (Servo pressure sensor invalid data) C14D0 (Accumulator pressure sensor voltage circuit check) C14D1 (Accumulator pressure sensor lost communication) C14D2 (Accumulator pressure sensor internal malfunction) C14D3 (Accumulator pressure sensor intermittent/erratic) C14D4 (Case 1) (Accumulator pressure sensor invalid data) C14D4 (Case 2) (Accumulator pressure sensor intermittent) C14D5 (Accumulator pressure sensor stuck) C14D7 (Acceleration sensor voltage circuit/open) C14DB (ABS solenoid power supply voltage circuit low) C14DE (Main relay voltage circuit low) C14DF (Main relay voltage circuit high) C14E1, C14E4, C14E7, C14EA (Case 1) (Speed sensor voltage circuit low) C14E1, C14E4, C14E7, C14EA (Case 2) (Speed sensor voltage circuit low) C14EE (Switching solenoid (SSA) stuck on) C14F7 (Switching solenoid (SGH) stuck on) P0572 (Stop light switch assembly open circuit) P0573 (Stop light switch assembly circuit high) P057C, P05DD (Brake pedal stroke sensor assembly open circuit) P057D, P05DE (Brake pedal stroke sensor assembly circuit high) P057E, P05DF (Brake pedal stroke sensor assembly intermittent/erratic) P05E0 (Brake pedal stroke sensor assembly "1"/"2" correlation) U0073 (Control module communication bus "A" off) U0074 (Control module communication bus "B" off) U0100 (Case 1) (Lost communication with ECM/PCM "A") U0100 (Case 2) (Lost communication with ECM/PCM "A") U0110 (Case 1) (Lost communication with drive motor control module "A") U0110 (Case 2) (Lost communication with drive motor control module "A") U0125 (Lost communication with multi-axis acceleration sensor module) U0293 (Case 1) (Lost communication with hybrid powertrain control module) U0293 (Case 2) (Lost communication with hybrid powertrain control module) U1106 (Lost communication with EPB* control module) U1107 (Lost communication with security module) |
| All of the following conditions are met | - |
| Power switch | Off |
| History of vehicle speed in this trip | Higher than 3 km/h (2 mph) |
| Reaction force pressure sensor fail | Not detected |
| Servo pressure sensor fail | Not detected |
| Brake-by-wire controlled mode | On |
| Brake fluid temperature | Higher than 0°C (32°F) |
| Monitor runs whenever the following DTCs are not stored | C0562 (Brake pedal stroke sensor assembly voltage circuit/open) C0597 (Case 1) (EEPROM malfunction) C0597 (Case 2) (Lost communication) C0597 (Case 3) (CPU malfunction) C0597 (Case 4) (IC malfunction) C121D (Pump motor open circuit) C121E (Pump motor circuit high) C1241 (Case 1 to 11) (Brake system voltage circuit low) C124B (Brake pedal stroke sensor assembly invalid data) C1256 (Accumulator pressure too low) C12FA (Main relay circuit low) C12FB (Main relay circuit high) C1345 (Linear solenoid open current learning not complete) C1392 (Brake pedal stroke sensor learning not complete) C13C1, C13CA, C14F2, C14FB (Linear solenoid range/performance) C13C2, C13CB, C14F3, C14FC (Linear solenoid circuit low) C13C3, C13CC, C14F4, C14FD (Linear solenoid circuit high) C13CD (Brake pressure too low) C13CE (Brake pressure too high) C1451 (High pressure hydraulic tube air bleeding not complete) C14B0 (Reaction force pressure sensor voltage circuit check) C14B1 (Reaction force pressure sensor lost communication) C14B2 (Reaction force pressure sensor internal malfunction) C14B3 (Reaction force pressure sensor exceeded learning limit) C14B4 (Reaction force pressure sensor intermittent/erratic) C14B5 (Reaction force pressure sensor invalid data) C14B6 (Brake stroke/reaction force pressure correlation) C14C0 (Servo pressure sensor voltage circuit check) C14C1 (Servo pressure sensor lost communication) C14C2 (Servo pressure sensor internal malfunction) C14C3 (Servo pressure sensor exceeded learning limit) C14C4 (Servo pressure sensor intermittent/erratic) C14C5 (Servo pressure sensor invalid data) C14D0 (Accumulator pressure sensor voltage circuit check) C14D1 (Accumulator pressure sensor lost communication) C14D2 (Accumulator pressure sensor internal malfunction) C14D3 (Accumulator pressure sensor intermittent/erratic) C14D4 (Case 1) (Accumulator pressure sensor invalid data) C14D4 (Case 2) (Accumulator pressure sensor intermittent) C14D5 (Accumulator pressure sensor stuck) C14DE (Main relay voltage circuit low) C14F7 (Switching solenoid (SGH) stuck on) P057C, P05DD (Brake pedal stroke sensor assembly open circuit) P057D, P05DE (Brake pedal stroke sensor assembly circuit high) P057E, P05DF (Brake pedal stroke sensor assembly intermittent/erratic) P05E0 (Brake pedal stroke sensor assembly "1"/"2" correlation) |
| All of the following conditions are met | - |
| Servo pressure sensor fail | Not detected |
| Brake-by-wire controlled mode | On |
| Target servo pressure | 0.5 MPa (5.1 kgf/cm2, 73 psi) or more |
| ABS/TRAC/VSC operation | Off |
| Brake | On |
| Monitor runs whenever the following DTCs are not stored | C0562 (Brake pedal stroke sensor assembly voltage circuit/open) C0597 (Case 1) (EEPROM malfunction) C0597 (Case 2) (Lost communication) C0597 (Case 3) (CPU malfunction) C0597 (Case 4) (IC malfunction) C121D (Pump motor open circuit) C121E (Pump motor circuit high) C1241 (Case 1 to 11) (Brake system voltage circuit low) C124B (Brake pedal stroke sensor assembly invalid data) C1256 (Accumulator pressure too low) C12FA (Main relay circuit low) C12FB (Main relay circuit high) C1345 (Linear solenoid open current learning not complete) C1392 (Brake pedal stroke sensor learning not complete) C13C1, C13CA, C14F2, C14FB (Linear solenoid range/performance) C13C2, C13CB, C14F3, C14FC (Linear solenoid circuit low) C13C3, C13CC, C14F4, C14FD (Linear solenoid circuit high) C13CD (Brake pressure too low) C13CE (Brake pressure too high) C1451 (High pressure hydraulic tube air bleeding not complete) C14B0 (Reaction force pressure sensor voltage circuit check) C14B1 (Reaction force pressure sensor lost communication) C14B2 (Reaction force pressure sensor internal malfunction) C14B3 (Reaction force pressure sensor exceeded learning limit) C14B4 (Reaction force pressure sensor intermittent/erratic) C14B5 (Reaction force pressure sensor invalid data) C14B6 (Brake stroke/reaction force pressure correlation) C14C0 (Servo pressure sensor voltage circuit check) C14C1 (Servo pressure sensor lost communication) C14C2 (Servo pressure sensor internal malfunction) C14C3 (Servo pressure sensor exceeded learning limit) C14C4 (Servo pressure sensor intermittent/erratic) C14C5 (Servo pressure sensor invalid data) C14D0 (Accumulator pressure sensor voltage circuit check) C14D1 (Accumulator pressure sensor lost communication) C14D2 (Accumulator pressure sensor internal malfunction) C14D3 (Accumulator pressure sensor intermittent/erratic) C14D4 (Case 1) (Accumulator pressure sensor invalid data) C14D4 (Case 2) (Accumulator pressure sensor intermittent) C14D5 (Accumulator pressure sensor stuck) C14DE (Main relay voltage circuit low) C14F7 (Switching solenoid (SGH) stuck on) P057C, P05DD (Brake pedal stroke sensor assembly open circuit) P057D, P05DE (Brake pedal stroke sensor assembly circuit high) P057E, P05DF (Brake pedal stroke sensor assembly intermittent/erratic) P05E0 (Brake pedal stroke sensor assembly "1"/"2" correlation) |
| All of the following conditions are met | - |
| Servo pressure sensor fail | Not detected |
| Brake-by-wire controlled mode | On |
| Target servo pressure | 1.7 to 3.14 MPa (17.3 to 32.0 kgf/cm2, 247 to 455 psi) or more |
| ABS/TRAC/VSC operation | On |
| Brake | On |
| Monitor runs whenever the following DTCs are not stored | C0562 (Brake pedal stroke sensor assembly voltage circuit/open) C0597 (Case 1) (EEPROM malfunction) C0597 (Case 2) (Lost communication) C0597 (Case 3) (CPU malfunction) C0597 (Case 4) (IC malfunction) C121D (Pump motor open circuit) C121E (Pump motor circuit high) C1241 (Case 1 to 11) (Brake system voltage circuit low) C124B (Brake pedal stroke sensor assembly invalid data) C1256 (Accumulator pressure too low) C12FA (Main relay circuit low) C12FB (Main relay circuit high) C1345 (Linear solenoid open current learning not complete) C1392 (Brake pedal stroke sensor learning not complete) C13C1, C13CA, C14F2, C14FB (Linear solenoid range/performance) C13C2, C13CB, C14F3, C14FC (Linear solenoid circuit low) C13C3, C13CC, C14F4, C14FD (Linear solenoid circuit high) C13CD (Brake pressure too low) C13CE (Brake pressure too high) C1451 (High pressure hydraulic tube air bleeding not complete) C14B0 (Reaction force pressure sensor voltage circuit check) C14B1 (Reaction force pressure sensor lost communication) C14B2 (Reaction force pressure sensor internal malfunction) C14B3 (Reaction force pressure sensor exceeded learning limit) C14B4 (Reaction force pressure sensor intermittent/erratic) C14B5 (Reaction force pressure sensor invalid data) C14B6 (Brake stroke/reaction force pressure correlation) C14C0 (Servo pressure sensor voltage circuit check) C14C1 (Servo pressure sensor lost communication) C14C2 (Servo pressure sensor internal malfunction) C14C3 (Servo pressure sensor exceeded learning limit) C14C4 (Servo pressure sensor intermittent/erratic) C14C5 (Servo pressure sensor invalid data) C14D0 (Accumulator pressure sensor voltage circuit check) C14D1 (Accumulator pressure sensor lost communication) C14D2 (Accumulator pressure sensor internal malfunction) C14D3 (Accumulator pressure sensor intermittent/erratic) C14D4 (Case 1) (Accumulator pressure sensor invalid data) C14D4 (Case 2) (Accumulator pressure sensor intermittent) C14D5 (Accumulator pressure sensor stuck) C14DE (Main relay voltage circuit low) C14F7 (Switching solenoid (SGH) stuck on) P057C, P05DD (Brake pedal stroke sensor assembly open circuit) P057D, P05DE (Brake pedal stroke sensor assembly circuit high) P057E, P05DF (Brake pedal stroke sensor assembly intermittent/erratic) P05E0 (Brake pedal stroke sensor assembly "1"/"2" correlation) |
| All of the following conditions are met | - |
| Servo pressure sensor fail | Not detected |
| Brake-by-wire controlled mode | On |
| Target servo pressure | 0.5 MPa (5.1 kgf/cm2, 73 psi) or more |
| Vehicle speed | 0 km/h (0 mph) |
| Brake | On |
| Monitor runs whenever the following DTCs are not stored | C0562 (Brake pedal stroke sensor assembly voltage circuit/open) C0597 (Case 1) (EEPROM malfunction) C0597 (Case 2) (Lost communication) C0597 (Case 3) (CPU malfunction) C0597 (Case 4) (IC malfunction) C121D (Pump motor open circuit) C121E (Pump motor circuit high) C1241 (Case 1 to 11) (Brake system voltage circuit low) C124B (Brake pedal stroke sensor assembly invalid data) C1256 (Accumulator pressure too low) C12FA (Main relay circuit low) C12FB (Main relay circuit high) C1345 (Linear solenoid open current learning not complete) C1392 (Brake pedal stroke sensor learning not complete) C139D (Linear solenoid (SLA) stuck on) C13C1, C13CA, C14F2, C14FB (Linear solenoid range/performance) C13C2, C13CB, C14F3, C14FC (Linear solenoid circuit low) C13C3, C13CC, C14F4, C14FD (Linear solenoid circuit high) C13CE (Brake pressure too high) C1451 (High pressure hydraulic tube air bleeding not complete) C14B0 (Reaction force pressure sensor voltage circuit check) C14B1 (Reaction force pressure sensor lost communication) C14B2 (Reaction force pressure sensor internal malfunction) C14B3 (Reaction force pressure sensor exceeded learning limit) C14B4 (Reaction force pressure sensor intermittent/erratic) C14B5 (Reaction force pressure sensor invalid data) C14B6 (Brake stroke/reaction force pressure correlation) C14C0 (Servo pressure sensor voltage circuit check) C14C1 (Servo pressure sensor lost communication) C14C2 (Servo pressure sensor internal malfunction) C14C3 (Servo pressure sensor exceeded learning limit) C14C4 (Servo pressure sensor intermittent/erratic) C14C5 (Servo pressure sensor invalid data) C14D0 (Accumulator pressure sensor voltage circuit check) C14D1 (Accumulator pressure sensor lost communication) C14D2 (Accumulator pressure sensor internal malfunction) C14D3 (Accumulator pressure sensor intermittent/erratic) C14D4 (Case 1) (Accumulator pressure sensor invalid data) C14D4 (Case 2) (Accumulator pressure sensor intermittent) C14D5 (Accumulator pressure sensor stuck) C14DE (Main relay voltage circuit low) C14F7 (Switching solenoid (SGH) stuck on) P057C, P05DD (Brake pedal stroke sensor assembly open circuit) P057D, P05DE (Brake pedal stroke sensor assembly circuit high) P057E, P05DF (Brake pedal stroke sensor assembly intermittent/erratic) P05E0 (Brake pedal stroke sensor assembly "1"/"2" correlation) |
| All of the following conditions are met | - |
| Servo pressure sensor fail | Not detected |
| Brake-by-wire controlled mode | On |
| Brake | On |
| ABS/TRAC/VSC operation | On |
| Monitor runs whenever the following DTCs are not stored | C0562 (Brake pedal stroke sensor assembly voltage circuit/open) C0597 (Case 1) (EEPROM malfunction) C0597 (Case 2) (Lost communication) C0597 (Case 3) (CPU malfunction) C0597 (Case 4) (IC malfunction) C121D (Pump motor open circuit) C121E (Pump motor circuit high) C1241 (Case 1 to 11) (Brake system voltage circuit low) C124B (Brake pedal stroke sensor assembly invalid data) C1256 (Accumulator pressure too low) C12FA (Main relay circuit low) C12FB (Main relay circuit high) C1345 (Linear solenoid open current learning not complete) C1392 (Brake pedal stroke sensor learning not complete) C139D (Linear solenoid (SLA) stuck on) C13C1, C13CA, C14F2, C14FB (Linear solenoid range/performance) C13C2, C13CB, C14F3, C14FC (Linear solenoid circuit low) C13C3, C13CC, C14F4, C14FD (Linear solenoid circuit high) C13CE (Brake pressure too high) C1451 (High pressure hydraulic tube air bleeding not complete) C14B0 (Reaction force pressure sensor voltage circuit check) C14B1 (Reaction force pressure sensor lost communication) C14B2 (Reaction force pressure sensor internal malfunction) C14B3 (Reaction force pressure sensor exceeded learning limit) C14B4 (Reaction force pressure sensor intermittent/erratic) C14B5 (Reaction force pressure sensor invalid data) C14B6 (Brake stroke/reaction force pressure correlation) C14C0 (Servo pressure sensor voltage circuit check) C14C1 (Servo pressure sensor lost communication) C14C2 (Servo pressure sensor internal malfunction) C14C3 (Servo pressure sensor exceeded learning limit) C14C4 (Servo pressure sensor intermittent/erratic) C14C5 (Servo pressure sensor invalid data) C14D0 (Accumulator pressure sensor voltage circuit check) C14D1 (Accumulator pressure sensor lost communication) C14D2 (Accumulator pressure sensor internal malfunction) C14D3 (Accumulator pressure sensor intermittent/erratic) C14D4 (Case 1) (Accumulator pressure sensor invalid data) C14D4 (Case 2) (Accumulator pressure sensor intermittent) C14D5 (Accumulator pressure sensor stuck) C14DE (Main relay voltage circuit low) C14F7 (Switching solenoid (SGH) stuck on) P057C, P05DD (Brake pedal stroke sensor assembly open circuit) P057D, P05DE (Brake pedal stroke sensor assembly circuit high) P057E, P05DF (Brake pedal stroke sensor assembly intermittent/erratic) P05E0 (Brake pedal stroke sensor assembly "1"/"2" correlation) |
| All of the following conditions are met | - |
| Servo pressure sensor fail | Not detected |
| Brake-by-wire controlled mode | On |
| Brake | On |
| ABS/TRAC/VSC operation | Off |
| Monitor runs whenever the following DTCs are not stored | C0562 (Brake pedal stroke sensor assembly voltage circuit/open) C0597 (Case 1) (EEPROM malfunction) C0597 (Case 2) (Lost communication) C0597 (Case 3) (CPU malfunction) C0597 (Case 4) (IC malfunction) C121D (Pump motor open circuit) C121E (Pump motor circuit high) C1241 (Case 1 to 11) (Brake system voltage circuit low) C124B (Brake pedal stroke sensor assembly invalid data) C1256 (Accumulator pressure too low) C12FA (Main relay circuit low) C12FB (Main relay circuit high) C1345 (Linear solenoid open current learning not complete) C1392 (Brake pedal stroke sensor learning not complete) C139D (Linear solenoid (SLA) stuck on) C13C1, C13CA, C14F2, C14FB (Linear solenoid range/performance) C13C2, C13CB, C14F3, C14FC (Linear solenoid circuit low) C13C3, C13CC, C14F4, C14FD (Linear solenoid circuit high) C13CD (Brake pressure too low) C1451 (High pressure hydraulic tube air bleeding not complete) C14B0 (Reaction force pressure sensor voltage circuit check) C14B1 (Reaction force pressure sensor lost communication) C14B2 (Reaction force pressure sensor internal malfunction) C14B3 (Reaction force pressure sensor exceeded learning limit) C14B4 (Reaction force pressure sensor intermittent/erratic) C14B5 (Reaction force pressure sensor invalid data) C14B6 (Brake stroke/reaction force pressure correlation) C14C0 (Servo pressure sensor voltage circuit check) C14C1 (Servo pressure sensor lost communication) C14C2 (Servo pressure sensor internal malfunction) C14C3 (Servo pressure sensor exceeded learning limit) C14C4 (Servo pressure sensor intermittent/erratic) C14C5 (Servo pressure sensor invalid data) C14D0 (Accumulator pressure sensor voltage circuit check) C14D1 (Accumulator pressure sensor lost communication) C14D2 (Accumulator pressure sensor internal malfunction) C14D3 (Accumulator pressure sensor intermittent/erratic) C14D4 (Case 1) (Accumulator pressure sensor invalid data) C14D4 (Case 2) (Accumulator pressure sensor intermittent) C14D5 (Accumulator pressure sensor stuck) C14DE (Main relay voltage circuit low) C14F7 (Switching solenoid (SGH) stuck on) P057C, P05DD (Brake pedal stroke sensor assembly open circuit) P057D, P05DE (Brake pedal stroke sensor assembly circuit high) P057E, P05DF (Brake pedal stroke sensor assembly intermittent/erratic) P05E0 (Brake pedal stroke sensor assembly "1"/"2" correlation) |
| All of the following conditions are met | - |
| Servo pressure sensor fail | Not detected |
| Brake-by-wire controlled mode | On |
| ABS/TRAC/VSC operation | Off |
| Vehicle speed | 0 km/h (0 mph) |
| Brake | On |
| Monitor runs whenever the following DTCs are not stored | C0562 (Brake pedal stroke sensor assembly voltage circuit/open) C0597 (Case 1) (EEPROM malfunction) C0597 (Case 2) (Lost communication) C0597 (Case 3) (CPU malfunction) C0597 (Case 4) (IC malfunction) C121D (Pump motor open circuit) C121E (Pump motor circuit high) C1241 (Case 1 to 11) (Brake system voltage circuit low) C124B (Brake pedal stroke sensor assembly invalid data) C1256 (Accumulator pressure too low) C12FA (Main relay circuit low) C12FB (Main relay circuit high) C1345 (Linear solenoid open current learning not complete) C1392 (Brake pedal stroke sensor learning not complete) C139D (Linear solenoid (SLA) stuck on) C13C1, C13CA, C14F2, C14FB (Linear solenoid range/performance) C13C2, C13CB, C14F3, C14FC (Linear solenoid circuit low) C13C3, C13CC, C14F4, C14FD (Linear solenoid circuit high) C13CD (Brake pressure too low) C1451 (High pressure hydraulic tube air bleeding not complete) C14B0 (Reaction force pressure sensor voltage circuit check) C14B1 (Reaction force pressure sensor lost communication) C14B2 (Reaction force pressure sensor internal malfunction) C14B3 (Reaction force pressure sensor exceeded learning limit) C14B4 (Reaction force pressure sensor intermittent/erratic) C14B5 (Reaction force pressure sensor invalid data) C14B6 (Brake stroke/reaction force pressure correlation) C14C0 (Servo pressure sensor voltage circuit check) C14C1 (Servo pressure sensor lost communication) C14C2 (Servo pressure sensor internal malfunction) C14C3 (Servo pressure sensor exceeded learning limit) C14C4 (Servo pressure sensor intermittent/erratic) C14C5 (Servo pressure sensor invalid data) C14D0 (Accumulator pressure sensor voltage circuit check) C14D1 (Accumulator pressure sensor lost communication) C14D2 (Accumulator pressure sensor internal malfunction) C14D3 (Accumulator pressure sensor intermittent/erratic) C14D4 (Case 1) (Accumulator pressure sensor invalid data) C14D4 (Case 2) (Accumulator pressure sensor intermittent) C14D5 (Accumulator pressure sensor stuck) C14DE (Main relay voltage circuit low) C14F7 (Switching solenoid (SGH) stuck on) P057C, P05DD (Brake pedal stroke sensor assembly open circuit) P057D, P05DE (Brake pedal stroke sensor assembly circuit high) P057E, P05DF (Brake pedal stroke sensor assembly intermittent/erratic) P05E0 (Brake pedal stroke sensor assembly "1"/"2" correlation) |
| All of the following conditions are met | - |
| Servo pressure sensor fail | Not detected |
| Brake-by-wire controlled mode | On |
| ABS/TRAC/VSC operation | Off |
| Vehicle speed | Higher than 0 km/h (0 mph) |
| Brake | On |
| Monitor runs whenever the following DTCs are not stored | C0562 (Brake pedal stroke sensor assembly voltage circuit/open) C0597 (Case 1) (EEPROM malfunction) C0597 (Case 2) (Lost communication) C0597 (Case 3) (CPU malfunction) C0597 (Case 4) (IC malfunction) C121D (Pump motor open circuit) C121E (Pump motor circuit high) C1241 (Case 1 to 11) (Brake system voltage circuit low) C124B (Brake pedal stroke sensor assembly invalid data) C1256 (Accumulator pressure too low) C12FA (Main relay circuit low) C12FB (Main relay circuit high) C1345 (Linear solenoid open current learning not complete) C1392 (Brake pedal stroke sensor learning not complete) C139D (Linear solenoid (SLA) stuck on) C13C1, C13CA, C14F2, C14FB (Linear solenoid range/performance) C13C2, C13CB, C14F3, C14FC (Linear solenoid circuit low) C13C3, C13CC, C14F4, C14FD (Linear solenoid circuit high) C13CD (Brake pressure too low) C1451 (High pressure hydraulic tube air bleeding not complete) C14B0 (Reaction force pressure sensor voltage circuit check) C14B1 (Reaction force pressure sensor lost communication) C14B2 (Reaction force pressure sensor internal malfunction) C14B3 (Reaction force pressure sensor exceeded learning limit) C14B4 (Reaction force pressure sensor intermittent/erratic) C14B5 (Reaction force pressure sensor invalid data) C14B6 (Brake stroke/reaction force pressure correlation) C14C0 (Servo pressure sensor voltage circuit check) C14C1 (Servo pressure sensor lost communication) C14C2 (Servo pressure sensor internal malfunction) C14C3 (Servo pressure sensor exceeded learning limit) C14C4 (Servo pressure sensor intermittent/erratic) C14C5 (Servo pressure sensor invalid data) C14D0 (Accumulator pressure sensor voltage circuit check) C14D1 (Accumulator pressure sensor lost communication) C14D2 (Accumulator pressure sensor internal malfunction) C14D3 (Accumulator pressure sensor intermittent/erratic) C14D4 (Case 1) (Accumulator pressure sensor invalid data) C14D4 (Case 2) (Accumulator pressure sensor intermittent) C14D5 (Accumulator pressure sensor stuck) C14DE (Main relay voltage circuit low) C14F7 (Switching solenoid (SGH) stuck on) P057C, P05DD (Brake pedal stroke sensor assembly open circuit) P057D, P05DE (Brake pedal stroke sensor assembly circuit high) P057E, P05DF (Brake pedal stroke sensor assembly intermittent/erratic) P05E0 (Brake pedal stroke sensor assembly "1"/"2" correlation) |
| All of the following conditions are met | - |
| Servo pressure sensor fail | Not detected |
| Brake-by-wire controlled mode | On |
| ABS/TRAC/VSC operation | Off |
| Brake | Off |
| *: Electric Parking Brake System | |
| Monitor runs whenever the following DTCs are not stored | C0501, C0507, C050D, C0513 (Speed sensor range/performance) C0502, C0508, C050E, C0514 (Speed sensor circuit low) C0503, C0509, C050F, C0515 (Speed sensor circuit high) C0504, C050A, C0510, C0516 (Speed sensor intermittent/erratic) C051C (Case 1) (Acceleration sensor range/performance) C051C (Case 2) (Acceleration sensor range/performance) C051C (Case 3) (Acceleration sensor range/performance) C051C (Case 4) (Acceleration sensor range/performance) C051E (Acceleration sensor intermittent/erratic) C0520 (Case 1) (Acceleration sensor 2 out of range) C0520 (Case 2) (Acceleration sensor 1 and acceleration sensor 2 out of range) C0520 (Case 3) (Acceleration sensor internal malfunction) C052B (ABS pump motor range/performance) C052D (ABS pump motor circuit high) C052E (ABS pump motor open circuit) C0562 (Brake pedal stroke sensor assembly voltage circuit/open) C0594 (Pump motor performance) C0597 (Case 1) (EEPROM malfunction) C0597 (Case 2) (Lost communication) C0597 (Case 3) (CPU malfunction) C0597 (Case 4) (IC malfunction) C1202 (Brake master cylinder reservoir assembly level too low) C120F (Brake fluid level warning switch open circuit) C121D (Pump motor open circuit) C121E (Pump motor circuit high) C123B (IG1 circuit low) C123E (IG2 circuit low) C1240 (Yaw rate and acceleration sensor incorrect) C1241 (Case 1 to 11) (Brake system voltage circuit low) C124A (CAN communication identification signal) C124B (Brake pedal stroke sensor assembly invalid data) C1256 (Accumulator pressure too low) C12A6, C12BC, C12D2, C12E8 (ABS holding solenoid range/performance) C12A7, C12BD, C12D3, C12E9 (ABS holding solenoid circuit low) C12A8, C12BE, C12D4, C12EA (ABS holding solenoid circuit high) C12B2, C12C8, C12DE, C12F4 (ABS reduction solenoid circuit low) C12B3, C12C9, C12DF, C12F5 (ABS reduction solenoid circuit high) C12FA (Main relay circuit low) C12FB (Main relay circuit high) C1336 (Acceleration sensor exceeded learning limit) C1345 (Linear solenoid open current learning not complete) C1349 (ABS holding solenoid open current learning not complete) C1392 (Brake pedal stroke sensor learning not complete) C139A (One hydraulic path fail) C139D (Linear solenoid (SLA) stuck on) C13C1, C13CA, C14F2, C14FB (Linear solenoid range/performance) C13C2, C13CB, C14F3, C14FC (Linear solenoid circuit low) C13C3, C13CC, C14F4, C14FD (Linear solenoid circuit high) C13CD (Brake pressure too low) C13CE (Brake pressure too high) C140B, C140C, C140D, C140E (2 wheel speed sensors malfunction) C1417 (Brake system voltage circuit high) C1427 (ABS pump motor stuck) C1451 (High pressure hydraulic tube air bleeding not complete) C146E (ABS solenoid power supply relay circuit low) C146F (ABS solenoid power supply relay circuit high) C14B0 (Reaction force pressure sensor voltage circuit check) C14B1 (Reaction force pressure sensor lost communication) C14B2 (Reaction force pressure sensor internal malfunction) C14B3 (Reaction force pressure sensor exceeded learning limit) C14B4 (Reaction force pressure sensor intermittent/erratic) C14B5 (Reaction force pressure sensor invalid data) C14B6 (Brake stroke/reaction force pressure correlation) C14C0 (Servo pressure sensor voltage circuit check) C14C1 (Servo pressure sensor lost communication) C14C2 (Servo pressure sensor internal malfunction) C14C3 (Servo pressure sensor exceeded learning limit) C14C4 (Servo pressure sensor intermittent/erratic) C14C5 (Servo pressure sensor invalid data) C14D0 (Accumulator pressure sensor voltage circuit check) C14D1 (Accumulator pressure sensor lost communication) C14D2 (Accumulator pressure sensor internal malfunction) C14D3 (Accumulator pressure sensor intermittent/erratic) C14D4 (Case 1) (Accumulator pressure sensor invalid data) C14D4 (Case 2) (Accumulator pressure sensor intermittent) C14D5 (Accumulator pressure sensor stuck) C14D7 (Acceleration sensor voltage circuit/open) C14DB (ABS solenoid power supply voltage circuit low) C14DE (Main relay voltage circuit low) C14DF (Main relay voltage circuit high) C14E1, C14E4, C14E7, C14EA (Case 1) (Speed sensor voltage circuit low) C14E1, C14E4, C14E7, C14EA (Case 2) (Speed sensor voltage circuit low) C14EE (Switching solenoid (SSA) stuck on) C14F7 (Switching solenoid (SGH) stuck on) P0572 (Stop light switch assembly open circuit) P0573 (Stop light switch assembly circuit high) P057C, P05DD (Brake pedal stroke sensor assembly open circuit) P057D, P05DE (Brake pedal stroke sensor assembly circuit high) P057E, P05DF (Brake pedal stroke sensor assembly intermittent/erratic) P05E0 (Brake pedal stroke sensor assembly "1"/"2" correlation) U0073 (Control module communication bus "A" off) U0074 (Control module communication bus "B" off) U0100 (Case 1) (Lost communication with ECM/PCM "A") U0100 (Case 2) (Lost communication with ECM/PCM "A") U0110 (Case 1) (Lost communication with drive motor control module "A") U0110 (Case 2) (Lost communication with drive motor control module "A") U0125 (Lost communication with multi-axis acceleration sensor module) U0293 (Case 1) (Lost communication with hybrid powertrain control module) U0293 (Case 2) (Lost communication with hybrid powertrain control module) U1106 (Lost communication with EPB* control module) U1107 (Lost communication with security module) |
| All of the following conditions are met | - |
| Power switch | Off |
| History of vehicle speed in this trip | Higher than 3 km/h (2 mph) |
| Reaction force pressure sensor fail | Not detected |
| Servo pressure sensor fail | Not detected |
| Brake-by-wire controlled mode | On |
| Brake fluid temperature | Higher than 0°C (32°F) |
| *: Electric Parking Brake System | |
| Monitor runs whenever the following DTCs are not stored | C0501, C0507, C050D, C0513 (Speed sensor range/performance) C0502, C0508, C050E, C0514 (Speed sensor circuit low) C0503, C0509, C050F, C0515 (Speed sensor circuit high) C0504, C050A, C0510, C0516 (Speed sensor intermittent/erratic) C051C (Case 1) (Acceleration sensor range/performance) C051C (Case 2) (Acceleration sensor range/performance) C051C (Case 3) (Acceleration sensor range/performance) C051C (Case 4) (Acceleration sensor range/performance) C051E (Acceleration sensor intermittent/erratic) C0520 (Case 1) (Acceleration sensor 2 out of range) C0520 (Case 2) (Acceleration sensor 1 and acceleration sensor 2 out of range) C0520 (Case 3) (Acceleration sensor internal malfunction) C052B (ABS pump motor range/performance) C052D (ABS pump motor circuit high) C052E (ABS pump motor open circuit) C0562 (Brake pedal stroke sensor assembly voltage circuit/open) C0594 (Pump motor performance) C0597 (Case 1) (EEPROM malfunction) C0597 (Case 2) (Lost communication) C0597 (Case 3) (CPU malfunction) C0597 (Case 4) (IC malfunction) C1202 (Brake master cylinder reservoir assembly level too low) C120F (Brake fluid level warning switch open circuit) C121D (Pump motor open circuit) C121E (Pump motor circuit high) C123B (IG1 circuit low) C123E (IG2 circuit low) C1240 (Yaw rate and acceleration sensor incorrect) C1241 (Case 1 to 11) (Brake system voltage circuit low) C124A (CAN communication identification signal) C124B (Brake pedal stroke sensor assembly invalid data) C1256 (Accumulator pressure too low) C12A6, C12BC, C12D2, C12E8 (ABS holding solenoid range/performance) C12A7, C12BD, C12D3, C12E9 (ABS holding solenoid circuit low) C12A8, C12BE, C12D4, C12EA (ABS holding solenoid circuit high) C12B2, C12C8, C12DE, C12F4 (ABS reduction solenoid circuit low) C12B3, C12C9, C12DF, C12F5 (ABS reduction solenoid circuit high) C12FA (Main relay circuit low) C12FB (Main relay circuit high) C1336 (Acceleration sensor exceeded learning limit) C1345 (Linear solenoid open current learning not complete) C1349 (ABS holding solenoid open current learning not complete) C1392 (Brake pedal stroke sensor learning not complete) C139A (One hydraulic path fail) C139D (Linear solenoid (SLA) stuck on) C13C1, C13CA, C14F2, C14FB (Linear solenoid range/performance) C13C2, C13CB, C14F3, C14FC (Linear solenoid circuit low) C13C3, C13CC, C14F4, C14FD (Linear solenoid circuit high) C13CD (Brake pressure too low) C13CE (Brake pressure too high) C1400 (ABS reduction solenoid leakage) C140B, C140C, C140D, C140E (2 wheel speed sensors malfunction) C1417 (Brake system voltage circuit high) C1427 (ABS pump motor stuck) C1451 (High pressure hydraulic tube air bleeding not complete) C146E (ABS solenoid power supply relay circuit low) C146F (ABS solenoid power supply relay circuit high) C14B0 (Reaction force pressure sensor voltage circuit check) C14B1 (Reaction force pressure sensor lost communication) C14B2 (Reaction force pressure sensor internal malfunction) C14B3 (Reaction force pressure sensor exceeded learning limit) C14B4 (Reaction force pressure sensor intermittent/erratic) C14B5 (Reaction force pressure sensor invalid data) C14B6 (Brake stroke/reaction force pressure correlation) C14C0 (Servo pressure sensor voltage circuit check) C14C1 (Servo pressure sensor lost communication) C14C2 (Servo pressure sensor internal malfunction) C14C3 (Servo pressure sensor exceeded learning limit) C14C4 (Servo pressure sensor intermittent/erratic) C14C5 (Servo pressure sensor invalid data) C14D0 (Accumulator pressure sensor voltage circuit check) C14D1 (Accumulator pressure sensor lost communication) C14D2 (Accumulator pressure sensor internal malfunction) C14D3 (Accumulator pressure sensor intermittent/erratic) C14D4 (Case 1) (Accumulator pressure sensor invalid data) C14D4 (Case 2) (Accumulator pressure sensor intermittent) C14D5 (Accumulator pressure sensor stuck) C14D7 (Acceleration sensor voltage circuit/open) C14DB (ABS solenoid power supply voltage circuit low) C14DE (Main relay voltage circuit low) C14DF (Main relay voltage circuit high) C14E1, C14E4, C14E7, C14EA (Case 1) (Speed sensor voltage circuit low) C14E1, C14E4, C14E7, C14EA (Case 2) (Speed sensor voltage circuit low) C14F7 (Switching solenoid (SGH) stuck on) P0572 (Stop light switch assembly open circuit) P0573 (Stop light switch assembly circuit high) P057C, P05DD (Brake pedal stroke sensor assembly open circuit) P057D, P05DE (Brake pedal stroke sensor assembly circuit high) P057E, P05DF (Brake pedal stroke sensor assembly intermittent/erratic) P05E0 (Brake pedal stroke sensor assembly "1"/"2" correlation) U0073 (Control module communication bus "A" off) U0074 (Control module communication bus "B" off) U0100 (Case 1) (Lost communication with ECM/PCM "A") U0100 (Case 2) (Lost communication with ECM/PCM "A") U0110 (Case 1) (Lost communication with drive motor control module "A") U0110 (Case 2) (Lost communication with drive motor control module "A") U0125 (Lost communication with multi-axis acceleration sensor module) U0293 (Case 1) (Lost communication with hybrid powertrain control module) U0293 (Case 2) (Lost communication with hybrid powertrain control module) U1106 (Lost communication with EPB* control module) U1107 (Lost communication with security module) |
| All of the following conditions are met | - |
| Power switch | Off |
| History of vehicle speed in this trip | Higher than 3 km/h (2 mph) |
| Reaction force pressure sensor fail | Not detected |
| Servo pressure sensor fail | Not detected |
| Brake-by-wire controlled mode | On |
| Brake fluid temperature | Higher than 0°C (32°F) |
| *: Electric Parking Brake System | |
| Monitor runs whenever the following DTCs are not stored | C0501, C0507, C050D, C0513 (Speed sensor range/performance) C0502, C0508, C050E, C0514 (Speed sensor circuit low) C0503, C0509, C050F, C0515 (Speed sensor circuit high) C0504, C050A, C0510, C0516 (Speed sensor intermittent/erratic) C051C (Case 1) (Acceleration sensor range/performance) C051C (Case 2) (Acceleration sensor range/performance) C051C (Case 3) (Acceleration sensor range/performance) C051C (Case 4) (Acceleration sensor range/performance) C051E (Acceleration sensor intermittent/erratic) C0520 (Case 1) (Acceleration sensor 2 out of range) C0520 (Case 2) (Acceleration sensor 1 and acceleration sensor 2 out of range) C0520 (Case 3) (Acceleration sensor internal malfunction) C052B (ABS pump motor range/performance) C052D (ABS pump motor circuit high) C052E (ABS pump motor open circuit) C0562 (Brake pedal stroke sensor assembly voltage circuit/open) C0594 (Pump motor performance) C0597 (Case 1) (EEPROM malfunction) C0597 (Case 2) (Lost communication) C0597 (Case 3) (CPU malfunction) C0597 (Case 4) (IC malfunction) C1202 (Brake master cylinder reservoir assembly level too low) C120F (Brake fluid level warning switch open circuit) C121D (Pump motor open circuit) C121E (Pump motor circuit high) C123B (IG1 circuit low) C123E (IG2 circuit low) C1240 (Yaw rate and acceleration sensor incorrect) C1241 (Case 1 to 11) (Brake system voltage circuit low) C124A (CAN communication identification signal) C124B (Brake pedal stroke sensor assembly invalid data) C1256 (Accumulator pressure too low) C12A6, C12BC, C12D2, C12E8 (ABS holding solenoid range/performance) C12A7, C12BD, C12D3, C12E9 (ABS holding solenoid circuit low) C12A8, C12BE, C12D4, C12EA (ABS holding solenoid circuit high) C12B2, C12C8, C12DE, C12F4 (ABS reduction solenoid circuit low) C12B3, C12C9, C12DF, C12F5 (ABS reduction solenoid circuit high) C12FA (Main relay circuit low) C12FB (Main relay circuit high) C1336 (Acceleration sensor exceeded learning limit) C1345 (Linear solenoid open current learning not complete) C1349 (ABS holding solenoid open current learning not complete) C1392 (Brake pedal stroke sensor learning not complete) C139A (One hydraulic path fail) C139D (Linear solenoid (SLA) stuck on) C13C1, C13CA, C14F2, C14FB (Linear solenoid range/performance) C13C2, C13CB, C14F3, C14FC (Linear solenoid circuit low) C13C3, C13CC, C14F4, C14FD (Linear solenoid circuit high) C13CD (Brake pressure too low) C13CE (Brake pressure too high) C1400 (ABS reduction solenoid leakage) C140B, C140C, C140D, C140E (2 wheel speed sensors malfunction) C1417 (Brake system voltage circuit high) C1427 (ABS pump motor stuck) C1451 (High pressure hydraulic tube air bleeding not complete) C146E (ABS solenoid power supply relay circuit low) C146F (ABS solenoid power supply relay circuit high) C14B0 (Reaction force pressure sensor voltage circuit check) C14B1 (Reaction force pressure sensor lost communication) C14B2 (Reaction force pressure sensor internal malfunction) C14B3 (Reaction force pressure sensor exceeded learning limit) C14B4 (Reaction force pressure sensor intermittent/erratic) C14B5 (Reaction force pressure sensor invalid data) C14B6 (Brake stroke/reaction force pressure correlation) C14C0 (Servo pressure sensor voltage circuit check) C14C1 (Servo pressure sensor lost communication) C14C2 (Servo pressure sensor internal malfunction) C14C3 (Servo pressure sensor exceeded learning limit) C14C4 (Servo pressure sensor intermittent/erratic) C14C5 (Servo pressure sensor invalid data) C14D0 (Accumulator pressure sensor voltage circuit check) C14D1 (Accumulator pressure sensor lost communication) C14D2 (Accumulator pressure sensor internal malfunction) C14D3 (Accumulator pressure sensor intermittent/erratic) C14D4 (Case 1) (Accumulator pressure sensor invalid data) C14D4 (Case 2) (Accumulator pressure sensor intermittent) C14D5 (Accumulator pressure sensor stuck) C14D7 (Acceleration sensor voltage circuit/open) C14DB (ABS solenoid power supply voltage circuit low) C14DE (Main relay voltage circuit low) C14DF (Main relay voltage circuit high) C14E1, C14E4, C14E7, C14EA (Case 1) (Speed sensor voltage circuit low) C14E1, C14E4, C14E7, C14EA (Case 2) (Speed sensor voltage circuit low) C14EE (Switching solenoid (SSA) stuck on) P0572 (Stop light switch assembly open circuit) P0573 (Stop light switch assembly circuit high) P057C, P05DD (Brake pedal stroke sensor assembly open circuit) P057D, P05DE (Brake pedal stroke sensor assembly circuit high) P057E, P05DF (Brake pedal stroke sensor assembly intermittent/erratic) P05E0 (Brake pedal stroke sensor assembly "1"/"2" correlation) U0073 (Control module communication bus "A" off) U0074 (Control module communication bus "B" off) U0100 (Case 1) (Lost communication with ECM/PCM "A") U0100 (Case 2) (Lost communication with ECM/PCM "A") U0110 (Case 1) (Lost communication with drive motor control module "A") U0110 (Case 2) (Lost communication with drive motor control module "A") U0125 (Lost communication with multi-axis acceleration sensor module) U0293 (Case 1) (Lost communication with hybrid powertrain control module) U0293 (Case 2) (Lost communication with hybrid powertrain control module) U1106 (Lost communication with EPB* control module) U1107 (Lost communication with security module) |
| All of the following conditions are met | - |
| Power switch | Off |
| History of vehicle speed in this trip | Higher than 3 km/h (2 mph) |
| Reaction force pressure sensor fail | Not detected |
| Servo pressure sensor fail | Not detected |
| Brake-by-wire controlled mode | On |
| Brake fluid temperature | Higher than 0°C (32°F) |
TYPICAL MALFUNCTION THRESHOLDS
C139A (Case 1)| Reaction force pressure | 4.5 MPa (45.9 kgf/cm2, 653 psi) or more |
| Reaction force pressure | 1.5 MPa (15.3 kgf/cm2, 218 psi) or more |
| Servo pressure | 0.1 MPa (1 kgf/cm2, 15 psi) or less |
| Both of the following conditions are met | - |
| Difference between target brake pressure and servo pressure | Higher than 2.7 to 4.14 MPa (27.5 to 42.2 kgf/cm2, 392 to 601 psi) |
| Delay of servo pressure increase | Higher than 0.3 to 4.584 seconds |
| Both of the following conditions are met | - |
| Difference between target brake pressure and servo pressure | Higher than 1.5 MPa (15.3 kgf/cm2, 218 psi) |
| Delay of servo pressure increase | Higher than 0.3 to 4.584 seconds |
| Both of the following conditions are met | - |
| Difference between servo pressure and target brake pressure | Higher than 1 to 4 MPa (10.2 to 40.8 kgf/cm2, 145 to 580 psi) |
| Delay of servo pressure decrease | Higher than 0.3 to 2.274 seconds |
| Difference between servo pressure and target brake pressure | Higher than 0.5 MPa (5.1 kgf/cm2, 73 psi) |
| All of the following conditions are met | - |
| Servo pressure decrease (a) | Higher than 0.4 MPa (4.1 kgf/cm2, 58 psi) |
| Gradient of servo pressure (b) | Less than -20 MPa/s |
| Servo pressure increase after ABS pump motor on after malfunction criteria (a) and (b) are met | Higher than 0.5 MPa (5.1 kgf/cm2, 73 psi) |
| Reduction of time required to ABS pump motor voltage drop below 1.3 V at ABS pump motor voltage on to off compared with no load condition after malfunction criteria (a) and (b) are met | 0.1 seconds or more |
| Either of the following conditions is met | A or B |
| A. Both of the following conditions are met | (a) and (b) |
| (a). Reaction force pressure decrease | 0.03 MPa (0.3 kgf/cm2, 4.4 psi) or more |
| (b). Reaction force pressure after malfunction criteria (a) is met | 0.2 MPa (2 kgf/cm2, 29 psi) or more |
| B. Both of the following conditions are met | (c) and (d) |
| (c). Reaction force pressure | Less than -0.6 MPa (-6.1 kgf/cm2, -87 psi) |
| (d). Reaction force pressure after malfunction criteria (c) is met | 0.2 MPa (2 kgf/cm2, 29 psi) or more |
COMPONENT OPERATING RANGE
C139A| All of the following conditions are met | - |
| Power switch | Off |
| History of vehicle speed in this trip | Higher than 3 km/h (2 mph) |
| Reaction force pressure sensor fail | Not detected |
| Servo pressure sensor fail | Not detected |
| Brake-by-wire controlled mode | On |
| Brake fluid temperature | Higher than 0°C (32°F) |
| Reaction force pressure | 4.5 MPa (45.9 kgf/cm2, 653 psi) or more for less than 0.003 seconds |
| Reaction force pressure | 1.5 MPa (15.3 kgf/cm2, 218 psi) or more for less than 0.5 seconds |
| All of the following conditions are met | - |
| Servo pressure sensor fail | Not detected |
| Brake-by-wire controlled mode | On |
| Brake | On |
| Servo pressure | Higher than 0.1 MPa (1 kgf/cm2, 15 psi) |
| All of the following conditions are met | - |
| Servo pressure sensor fail | Not detected |
| Brake-by-wire controlled mode | On |
| Brake | On |
| Servo pressure | 0.5 MPa (5.1 kgf/cm2, 73 psi) or more |
| Malfunction criteria | Not met |
| All of the following conditions are met | - |
| Servo pressure sensor fail | Not detected |
| Brake-by-wire controlled mode | On |
| Servo pressure decreases after linear solenoid (SLR) on | Higher than 0.5 MPa (5.1 kgf/cm2, 73 psi) |
| Malfunction criteria | Not met |
| All of the following conditions are met | A, B, C, D, E, F and G |
| A. Power switch | Off |
| B. History of vehicle speed in this trip | Higher than 3 km/h (2 mph) |
| C. Reaction force pressure sensor fail | Not detected |
| D. Servo pressure sensor fail | Not detected |
| E. Brake-by-wire controlled mode | On |
| F. Brake fluid temperature | Higher than 0°C (32°F) |
| G. Any of the following conditions are met | (a), (b), (c) or (d) |
| (a). Servo pressure decrease | 0.4 MPa (4.1 kgf/cm2, 58 psi) or less for 2 seconds or more |
| (b). Gradient of servo pressure | -20 MPa/s or more for 2 seconds or more |
| (c). Servo pressure increase after ABS pump motor on after malfunction criteria (a) and (b) are met | Higher than 0.5 MPa (5.1 kgf/cm2, 73 psi) for less than 0.051 seconds |
| (d). Reduction of time required to ABS pump motor voltage drop below 1.3 V at ABS pump motor voltage on to off compared with no load condition after malfunction criteria (a) and (b) are met | Less than 0.1 seconds |
| All of the following conditions are met | A, B, C, D, E, F and G |
| A. Power switch | Off |
| B. History of vehicle speed in this trip | Higher than 3 km/h (2 mph) |
| C. Reaction force pressure sensor fail | Not detected |
| D. Servo pressure sensor fail | Not detected |
| E. Brake-by-wire controlled mode | On |
| F. Brake fluid temperature | Higher than 0°C (32°F) |
| G. Either of the following condition is met | a or b |
| a. Both of the following conditions are met | - |
| Reaction force pressure decrease (a) | 0.03 MPa (0.3 kgf/cm2, 4.4 psi) or more for less than 6 seconds |
| Reaction force pressure (b) | Less than -0.6 MPa (-6.1 kgf/cm2, -87 psi) for less than 6 seconds |
| b. Reaction force pressure after malfunction criteria (b) is met | 0.2 MPa (2 kgf/cm2, 29 psi) or more for less than 1.5 seconds |
CONFIRMATION DRIVING PATTERN
- Connect the Techstream to the DLC3.
- Turn the power switch on (READY).
- Turn the Techstream on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Drive the vehicle at 3 km/h (2 mph) or more for 1 second.
- Turn the power switch off.
- Wait 4 minutes.
- Turn the power switch on (IG).
- Depress the brake pedal for 2 seconds, release it and wait 1 second.
- Turn the Techstream on.
- Enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Codes.
-
Read the DTCs.
HINT:
- If a DTC is output, the system is malfunctioning.
- If a DTC is not output, perform the following procedure.
-
If the DTCs are not output, perform a universal trip and check for permanent DTCs.
Click here
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HINT:
- If a permanent DTC is output, the system is malfunctioning.
- If no permanent DTCs are output, the system is normal.
WIRING DIAGRAM
Refer to DTCs C1352, C1353, C1354, C1355, C1356, C1357, C1358 and C1359
Click here
CAUTION / NOTICE / HINT
NOTICE:
After replacing the brake booster with master cylinder assembly or brake actuator assembly, perform linear solenoid valve offset learning, ABS holding solenoid valve learning, yaw rate and acceleration sensor zero point calibration and system information memorization after performing "Reset Memory".
Click here
PROCEDURE
| 1. | CUSTOMER PROBLEM ANALYSIS (CHECK CONDITION WHEN MALFUNCTION OCCURRED) AND FREEZE FRAME DATA |
(a) Interview the customer to check the vehicle conditions when the brake warning light / yellow (minor malfunction) illuminated.
(b) Using the Techstream, read the "Shift Lever Position", "Vehicle Speed", "Yaw Rate Sensor", "Steering Angle Sensor", "Reaction Force Pressure", "Servo Pressure" and "Accumulator Pressure" of the Freeze Frame Data stored when the DTC was stored.
Also, read the Freeze Frame Data stored when the DTC was stored and make a note of the INF codes.
Click here
NOTICE:
Make sure to make a note of the INF codes as they are used in a following step.
HINT:
- Freeze Frame Data is only stored once when a DTC is stored.
- If other DTCs are output, repair any malfunctions related to those DTCs first, and then reproduce the conditions that caused DTC C1214 to be stored based on the interview with the customer.
|
| 2. | CHECK FOR FLUID LEAK |
(a) Check that there are no fluid leaks in the brake lines between the brake booster with master cylinder assembly and the wheel cylinders.
(b) Check that there is no brake fluid leaks from the brake booster with master cylinder assembly or brake actuator assembly body.
(c) Check that the brakes are not dragging.
OK:
There are no fluid leaks or dragging.
| NG |  | REPAIR OR REPLACE APPLICABLE PART |
|
| 3. | PERFORM AIR BLEEDING |
(a) Clear the DTCs.
Click here
(b) Perform the air bleeding procedure in Bleed Brake System.
Click here
|
| 4. | CHECK BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY AND BRAKE ACTUATOR ASSEMBLY (ACTUATOR SIDE) |
(a) Turn the power switch off.
(b) Make sure that there is no looseness at the locking part and the connecting part of the connectors.
OK:
The connector is securely connected.
(c) Disconnect the A45 skid control ECU (brake booster with master cylinder assembly) connector 2 minutes after the power switch is turned off.
(d) Disconnect the A54 brake actuator assembly connector.
(e) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
| Result | Proceed to |
|---|---|
| OK | A |
| NG (skid control ECU (brake booster with master cylinder assembly)) | B |
| NG (brake actuator assembly) | C |
| B | | REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY |
| C | | REPLACE BRAKE ACTUATOR ASSEMBLY |
|
| 5. | CHECK HARNESS AND CONNECTOR (VEHICLE SIDE) |
(a) Reconnect the A45 skid control ECU (brake booster with master cylinder assembly) connector.
(b) Reconnect the A54 brake actuator assembly connector.
(c) Measure the voltage and resistance on the wire harness side.
Click here
OK:
Voltage and resistance readings are all normal.
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 6. | CHECK HARNESS AND CONNECTOR (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY - BRAKE ACTUATOR ASSEMBLY) |
(a) Turn the power switch off.
(b) Make sure that there is no looseness at the locking part and the connecting part of the connectors.
OK:
The connector is securely connected.
(c) Disconnect the A45 skid control ECU (brake booster with master cylinder assembly) connector.
(d) Disconnect the A54 brake actuator assembly connector.
(e) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(f) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A45-14 (+BS) - A54-5 (+BS) | Always | Below 1 Ω |
| A45-14 (+BS) or A54-5 (+BS) - Body ground | Always | 10 kΩ or higher |
| A45-48 (SFRH) - A54-28 (SFRH) | Always | Below 1 Ω |
| A45-48 (SFRH) or A54-28 (SFRH) - Body ground | Always | 10 kΩ or higher |
| A45-49 (SFLH) - A54-31 (SFLH) | Always | Below 1 Ω |
| A45-49 (SFLH) or A54-31 (SFLH) - Body ground | Always | 10 kΩ or higher |
| A45-50 (SRRH) - A54-30 (SRRH) | Always | Below 1 Ω |
| A45-50 (SRRH) or A54-30 (SRRH) - Body ground | Always | 10 kΩ or higher |
| A45-51 (SRLH) - A54-29 (SRLH) | Always | Below 1 Ω |
| A45-51 (SRLH) or A54-29 (SRLH) - Body ground | Always | 10 kΩ or higher |
| A45-44 (SFRR) - A54-18 (SFRR) | Always | Below 1 Ω |
| A45-44 (SFRR) or A54-18 (SFRR) - Body ground | Always | 10 kΩ or higher |
| A45-45 (SFLR) - A54-15 (SFLR) | Always | Below 1 Ω |
| A45-45 (SFLR) or A54-15 (SFLR) - Body ground | Always | 10 kΩ or higher |
| A45-46 (SRRR) - A54-16 (SRRR) | Always | Below 1 Ω |
| A45-46 (SRRR) or A54-16 (SRRR) - Body ground | Always | 10 kΩ or higher |
| A45-47 (SRLR) - A54-17 (SRLR) | Always | Below 1 Ω |
| A45-47 (SRLR) or A54-17 (SRLR) - Body ground | Always | 10 kΩ or higher |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 7. | CHECK INFORMATION CODE |
(a) Reconnect the A45 skid control ECU (brake booster with master cylinder assembly) connector.
(b) Reconnect the A54 brake actuator assembly connector.
(c) Reconfirm the INF codes noted in step 1.
| Result | Proceed to |
|---|---|
| INF code 431, 432 or 436 was output in step 1. | A |
| INF code 438 was output in step 1. | B |
| INF code 440 or 441 was output in step 1. | C |
| INF code 442 was output in step 1. | D |
| B | | GO TO STEP 11 |
| C | | GO TO STEP 15 |
| D | | GO TO STEP 16 |
|
| 8. | READ VALUE USING TECHSTREAM (SERVO PRESSURE) |
(a) Connect an LSPV gauge set.
(b) Select the Data List on the Techstream.
Click here
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Servo Pressure | Pressure value of servo | Min.: 0.00 MPa, Max.: 24.48 MPa | Brake pedal released: 0.00 to 2.10 MPa | Brake pedal is being depressed: Changes in proportion to the depression force of the brake pedal |
| Tester Display |
|---|
| Servo Pressure |
(c) Depress the brake pedal slowly and check the servo pressure output values with respect to the wheel cylinder pressure values for each wheel.
Standard Pressure:
Servo Pressure (for Front Right Wheel)| Hydraulic Pressure [MPa (kgf/cm2, psi)] | Servo Pressure [MPa] |
|---|---|
| 2.0 (20.4, 290) | 0.3 to 4.3 |
| 5.0 (51.0, 725) | 3.3 to 7.3 |
| 7.0 (71.4, 1015) | 5.3 to 9.3 |
| Hydraulic Pressure [MPa (kgf/cm2, psi)] | Servo Pressure [MPa] |
|---|---|
| 2.0 (20.4, 290) | 0.3 to 4.3 |
| 5.0 (51.0, 725) | 3.3 to 7.3 |
| 7.0 (71.4, 1015) | 5.3 to 9.3 |
| NG | | REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY |
|
| 9. | CHECK BRAKE DISC |
(a) Turn the power switch off.
(b) Disconnect the A44 brake pedal stroke sensor assembly connector.
(c) Perform a road test according to Freeze Frame Data or customer problem analysis. While driving, check for abnormal brake pedal vibration caused by brake discs that are worn or have excess runout.
OK:
Brake pedal does not vibrate during braking.
HINT:
- An unevenly worn disc may vibrate the caliper piston and cause fluctuations in brake line pressure, triggering a malfunction detection condition.
- The brake pedal does not kick back due to caliper piston vibration during electronically controlled brake system control.
- If the brake pedal stroke sensor assembly connector is disconnected, the fail-safe function will prohibit electronically controlled brake system control.
- The Active Test does not prohibit electronically controlled brake system control when the vehicle is being driven, so disconnect the brake pedal stroke sensor assembly connector before continuing with inspection.
-
Uneven disc wear can be checked by measuring the disc thickness variation.
for Front Brake: Click here
for Rear Brake: Click here
| NG | | REPLACE BRAKE DISC |
|
| 10. | RECONFIRM DTC |
(a) Turn the power switch off.
(b) Reconnect the A44 brake pedal stroke sensor assembly connector.
(c) Clear the DTCs.
Click here
(d) Perform a road test under the same malfunction conditions recreated based on the Freeze Frame Data or customer problem analysis.
(e) Turn the power switch off and wait for 2 minutes or more.
(f) Turn the power switch on (IG).
(g) Check if the same DTC is output.
Click here
| Result | Proceed to |
|---|---|
| DTC C1214 is not output. | A |
| DTC C1214 is output. | B |
HINT:
If the DTC is no longer output, it can be suspected that it was output due to an improperly connected connector.
Click here
| A | | USE SIMULATION METHOD TO CHECK |
| B | | REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY |
| 11. | READ VALUE USING TECHSTREAM (SERVO PRESSURE) |
(a) Connect an LSPV gauge set.
(b) Select the Data List on the Techstream.
Click here
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Servo Pressure | Pressure value of servo | Min.: 0.00 MPa, Max.: 24.48 MPa | Brake pedal released: 0.00 to 2.10 MPa | Brake pedal is being depressed: Changes in proportion to the depression force of the brake pedal |
| Tester Display |
|---|
| Servo Pressure |
(c) Depress the brake pedal slowly and check the servo pressure output values with respect to the wheel cylinder pressure values for each wheel.
Standard Pressure:
Servo Pressure (for Front Right Wheel)| Hydraulic Pressure [MPa (kgf/cm2, psi)] | Servo Pressure [MPa] |
|---|---|
| 2.0 (20.4, 290) | 0.3 to 4.3 |
| 5.0 (51.0, 725) | 3.3 to 7.3 |
| 7.0 (71.4, 1015) | 5.3 to 9.3 |
| Hydraulic Pressure [MPa (kgf/cm2, psi)] | Servo Pressure [MPa] |
|---|---|
| 2.0 (20.4, 290) | 0.3 to 4.3 |
| 5.0 (51.0, 725) | 3.3 to 7.3 |
| 7.0 (71.4, 1015) | 5.3 to 9.3 |
| NG | | REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY |
|
| 12. | CHECK BRAKE DISC |
(a) Turn the power switch off.
(b) Disconnect the A44 brake pedal stroke sensor assembly connector.
(c) Perform a road test according to Freeze Frame Data or customer problem analysis. While driving, check for abnormal brake pedal vibration caused by brake discs that are worn or have excess runout.
OK:
Brake pedal does not vibrate during braking.
HINT:
- An unevenly worn disc may vibrate the caliper piston and cause fluctuations in brake line pressure, triggering a malfunction detection condition.
- The brake pedal does not kick back due to caliper piston vibration during electronically controlled brake system control.
- If the brake pedal stroke sensor assembly connector is disconnected, the fail-safe function will prohibit electronically controlled brake system control.
- The Active Test does not prohibit electronically controlled brake system control when the vehicle is being driven, so disconnect the brake pedal stroke sensor assembly connector before continuing with inspection.
-
Uneven disc wear can be checked by measuring the disc thickness variation.
for Front Brake: Click here
for Rear Brake: Click here
| NG | | REPLACE BRAKE DISC |
|
| 13. | READ VALUE USING TECHSTREAM (BRAKE PEDAL STROKE SENSOR ASSEMBLY) |
(a) Turn the power switch off.
(b) Reconnect the A44 brake pedal stroke sensor assembly connector.
(c) Clear the DTCs.
Click here
(d) Turn the power switch off.
(e) Mount a pedal effort gauge.
(f) Turn the power switch on (READY) and depress the brake pedal once.
HINT:
Depress the brake pedal after turning the power switch on (READY) to set the vehicle to linear mode (switching solenoid (SSA) on).
(g) Select the Data List on the Techstream.
Click here
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Stroke Sensor | Brake pedal stroke sensor | Min.: 0.00 V, Max.: 5.00 V | Brake pedal released: 0.65 to 1.35 V | Reading increases when brake pedal is depressed |
| Stroke Sensor2 | Brake pedal stroke sensor 2 | Min.: 0.00 V, Max.: 5.00 V | Brake pedal released: 3.65 to 4.35 V | Reading decreases when brake pedal is depressed |
| Tester Display |
|---|
| Stroke Sensor |
| Stroke Sensor2 |
(h) Depress the brake pedal slowly and check the brake pedal stroke sensor assembly output voltages with respect to brake pedal depression force.
NOTICE:
Perform this procedure in linear mode (switching solenoid (SSA) on).
Standard Voltage:
| Brake Effort [N (kgf, lbf)] | Stroke Sensor [V] | Stroke Sensor2 [V] |
|---|---|---|
| 50 (5, 11.2) | 1.27 to 1.97 | 3.03 to 3.73 |
| 100 (10, 22.5) | 1.45 to 2.15 | 2.85 to 3.55 |
| 200 (20, 45.0) | 1.67 to 2.37 | 2.63 to 3.33 |
| 500 (51, 112.4) | 1.83 to 2.53 | 2.47 to 3.17 |
| NG | | REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY |
|
| 14. | RECONFIRM DTC |
(a) Clear the DTCs.
Click here
(b) Perform a road test under the same malfunction conditions recreated based on the Freeze Frame Data or customer problem analysis.
(c) Turn the power switch off and wait for 2 minutes or more.
(d) Turn the power switch on (IG).
(e) Check if the same DTC is output.
Click here
| Result | Proceed to |
|---|---|
| DTC C1214 is not output. | A |
| DTC C1214 is output. | B |
HINT:
If the DTC is no longer output, it can be suspected that it was output due to an improperly connected connector.
Click here
| A | | USE SIMULATION METHOD TO CHECK |
| B | | REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY |
| 15. | RECONFIRM DTC |
(a) Clear the DTCs.
Click here
(b) Perform a road test under the same malfunction conditions recreated based on the Freeze Frame Data or customer problem analysis.
(c) Turn the power switch off and wait for 2 minutes or more.
(d) Turn the power switch on (IG).
(e) Check if the same DTC is output.
Click here
| Result | Proceed to |
|---|---|
| DTC C1214 is not output. | A |
| DTC C1214 is output. | B |
HINT:
If the DTC is no longer output, it can be suspected that it was output due to an improperly connected connector.
Click here
| A | | USE SIMULATION METHOD TO CHECK |
| B | | REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY |
| 16. | INSPECT BRAKE PEDAL STROKE SENSOR ASSEMBLY OUTPUT VOLTAGES AND WHEEL CYLINDER PRESSURE |
(a) Mount a pedal effort gauge.
(b) Disconnect the A55 brake booster pump assembly connector.
(c) Depress the brake pedal 10 times or more until it becomes hard.
HINT:
Depressing the brake pedal with the connector of the brake booster pump assembly disconnected drops the accumulator pressure to approximately 0 MPa.
(d) Connect an LSPV gauge set.
(e) Select the Data List on the Techstream.
Click here
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Stroke Sensor | Brake pedal stroke sensor | Min.: 0.00 V, Max.: 5.00 V | Brake pedal released: 0.65 to 1.35 V | Reading increases when brake pedal is depressed |
| Tester Display |
|---|
| Stroke Sensor |
(f) Slowly depress the brake pedal and check the brake pedal stroke sensor assembly output voltages and the wheel cylinder pressure with respect to brake pedal depression force.
NOTICE:
Check the wheel cylinder pressure with the switching solenoid (SSA, SGH) off and an accumulator pressure of 0 MPa.
Standard Pressure:
for Front Right Wheel| Brake Effort [N (kgf, lbf)] | Stroke Sensor [V] | Hydraulic Pressure [MPa (kgf/cm2, psi)] |
|---|---|---|
| 200 (20, 45.0) | 1.42 to 2.12 | 0.03 (0.3, 4.4) to 2.03 (20.7, 294) |
| 500 (51, 112.4) | 1.67 to 2.37 | 2.06 (21.0, 299) to 4.06 (41.4, 589) |
| Brake Effort [N (kgf, lbf)] | Stroke Sensor [V] | Hydraulic Pressure [MPa (kgf/cm2, psi)] |
|---|---|---|
| 200 (20, 45.0) | 1.42 to 2.12 | 0.03 (0.3, 4.4) to 2.03 (20.7, 294) |
| 500 (51, 112.4) | 1.67 to 2.37 | 2.06 (21.0, 299) to 4.06 (41.4, 589) |
| NG | | REPLACE BRAKE ACTUATOR ASSEMBLY |
|
| 17. | RECONFIRM DTC |
(a) Turn the power switch off.
(b) Reconnect the A55 brake booster pump assembly connector.
(c) Clear the DTCs.
Click here
(d) Perform a road test under the same malfunction conditions recreated based on the Freeze Frame Data or customer problem analysis.
(e) Turn the power switch off and wait for 2 minutes or more.
(f) Turn the power switch on (IG).
(g) Check if the same DTC is output.
Click here
| Result | Proceed to |
|---|---|
| DTC C1214 is not output. | A |
| DTC C1214 is output. | B |
HINT:
If the DTC is no longer output, it can be suspected that it was output due to an improperly connected connector.
Click here
| A | | USE SIMULATION METHOD TO CHECK |
| B | | REPLACE BRAKE ACTUATOR ASSEMBLY |
READ NEXT:
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DESCRIPTION If a malfunction is detected in the power supply circuit, the skid control ECU (brake booster with master cylinder assembly) power source voltage drops, or there is insufficient voltage to
SEE MORE:
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Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspect
HVAC Control Module to Hybrid Powertrain Control Module Invalid Serial Data Received (U042481)
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